What I Found
Check the Mode and Watts
A powerful USB-C charger can still leave an important compatibility question unanswered. In this illustrated explainer, I look at AVS—Adjustable Voltage Supply—and why the watt number on the box does not tell you every charging mode the adapter supports or what your iPhone Duo will request.
The charger offers its capabilities through USB Power Delivery, the Duo requests a supported setting, and the charger accepts. AVS provides a supported range of selectable voltages, giving a compatible setup more options than a few fixed profiles. PPS and AVS are different modes, so a PPS label alone does not establish AVS support.
The documented example is the Anker Nano Neo from Anker’s US range, model A120M. Its linked manual lists AVS output ranges spanning 9–20V and up to 65W. Those are charger specifications, not measurements of a Duo drawing 65W. The exact model and current manual matter more than the brand name or the largest number on the packaging.
For the Duo’s fastest advertised wired setup, Apple’s current guidance lists its own adapter or a comparable third-party adapter with at least 60W capability, USB PD 3.2, and AVS, together with the supplied USB-C cable. The video also covers the other half of a fair comparison: temperature, active use, settings, and starting battery level. Apple’s stated Duo benchmark starts with a drained device in its open position.
This is a compatibility explainer built with diagrams and real Duo Simulator screen captures. It does not present a physical Duo charge-time, voltage, or temperature test. A particular setup’s speed or heat improvement would still need measurement. The product-reference links below are official links, not affiliate links; my separate gear pages and eligible YouTube Shopping purchases may earn me a commission at no extra cost to you.
What this video covers
- Why wattage, USB-C connector shape, and brand names do not identify every supported charging mode.
- How the charger and Duo agree on a setting through USB Power Delivery.
- What AVS adds and why PPS support is a separate question.
- The US Anker A120M manual as a documented example.
- Matching the cable, temperature, usage, and starting battery conditions.
The short version
Before buying another adapter, check the exact model’s supported modes against Apple’s current Duo instructions. Use the recommended cable and compare the conditions as well as the equipment. AVS is a compatibility detail worth checking; it does not by itself promise a particular charge time or mean the phone takes the adapter’s full rated wattage.
